Improvement in adjustable tumblers for permutation looks



r do PATENTED DEC 3 I867 'gnitrh'tates gai ffi OLIVER E. PILLARD, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO IMPROVEMENT IN ADJUSTABLE TUMBLERS FOR. PERMUTATION LOCKS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, OLIVER E. PILLARD, of New Britain, in the county of. Hartford, and State of Connecticut, have invented and made a certain new and useful Improvement in Locks; and I do hereby declare the following to be a full, clear, and exact description of the said invention, reference being bad to the annexed drawing, making part of this specification, wherein- Figure 1 is an elevation of one of the tumblers of a lock, showing my improvement with the cap-plate removed, and I Figure 2 is a transverse section of the same at the line a as.

Similar letters denote the same parts.

My invention relates to the peculiar construction of a circular tumbleig for use in that class of locks in which a series of such circular tumblers is employed upon a spindle that is'operated by a handle or knob, and provided with an index, so that the tumblers are successively placed in their proper position by the rotation of said knob and index. This character of lock and its mode of construction being wellknown, a further description is rendered unnecessary. p

The peculiar feature of my presentinvention consists in afriction-band, that is introduced within the notched ring forming the exterior portion of the tumbler, and surrounds the disk that is upon the tumblenaxis', and carries the pin by which one tumbler is made to move the next; and'with these Icombine a cam, that is so located that its rotation shall draw the ends of the friction-band towardeeach other, and clamp the disk, nd thereby firmiy connect the two' parts by a more extended frictional contact than has heretofore'been employed.

By this construction the adjustment of the tumblers is greatly i'acilita'ted, and the risk of their becoming misplaced by use is lessened and efiectually removed.

In the drawing, a is the tumbler-axis, fitted as usual; 6 is'the disk surrounding the same, and carrying the stud c, by means of which one tumbler communicates motion to the" next, as heretofore usual d is the tumblerring, with a notch ate, for the bolt-stud to pass into when the tumblers are turned, so that the notches all stand on a line. The ring d is made hollow, and a friction-band, z, is introduced around the periphery of the disk 6,

and the ends of this friction-band are turned ofl radially. Qne comes against a fixed stud, Z, the otheris operated uponby an eccentric or cam, 71, that is fitted to turn in the space between the two plates forming the hollow tumbler-ring d.' A polygonal hole is formed through the hub of the cam h, forreceiying a-key, by means of which the same may beturned for relieving or tightening the friction-band 2'.

When the lock is open, and a polygonal key introduced throughthe coins of all the tumblers, the frictional contact and-connection oi the various tumblers with their disks will be relievedby turning such key; after which the tumblers can be set in succession to the desired index-points, and then secured by rotating the cams to tighten the friction-straps. The eccentric or cam in most locks will be the most convenient mechanism for tightening the-friction-strap; but I do not limit myself to the use of the eccentric as themechanism for so tightening the strap.

What I claim, and desire to secure by Letters Patent, isi The friction-strap i, applied around the periphery of the stud-disk b, and within the notched tumbler. d, in combination with mechanism for tightening said strap, substantially as and for the purposes set forth.

In-Jvitness whereof, I have hereunto set my signature, this eighth day of June, A. Di 1867.

OLIVER E. PILL-ARI).

Witnesses:

Onsnnns R. HART, Hnunr Nnsn. 

